In Assassin's Creed Rogue, Shay's surname is Cormac, and he is the Assassin who changes allegiance to the Templars.
Shay Patrick Cormac begins Rogue as a member of the Colonial Brotherhood of Assassins. After a mission connected to an Isu artifact causes a catastrophic earthquake in Lisbon, Shay becomes disillusioned with the Assassins' willingness to pursue dangerous objects. He eventually leaves the Brotherhood and joins the Templars, becoming an Assassin hunter.
Rogue is set during the eighteenth century and connects the North Atlantic, the Appalachian frontier, and New York City. Its story is notable because the player experiences the conflict from a Templar perspective after Shay's change of allegiance. The game also links its narrative to Assassin's Creed IV: Black Flag and Assassin's Creed III through characters and family history.
Shay's surname is often confused with Kenway because Haytham and Connor belong to the Kenway family, while Shay is a separate character. Dorian is Arno's surname in Unity, and Frye is the family name of Jacob and Evie in Syndicate. “Cormac” is the concise identifying answer for Shay's family name.